public final class FunctionSequenceCoercer extends UnaryExpression
| Modifier and Type | Class and Description |
|---|---|
static class |
FunctionSequenceCoercer.Coercer |
operandEFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
|---|
FunctionSequenceCoercer(Expression sequence,
SpecificFunctionType requiredItemType,
RoleLocator role,
TypeCheckerEnvironment visitor)
Constructor
|
| Modifier and Type | Method and Description |
|---|---|
int |
computeCardinality()
Determine the static cardinality of the expression
|
int |
computeSpecialProperties()
Determine the special properties of this expression
|
Expression |
copy()
Copy an expression.
|
boolean |
equals(Object other)
Is this expression the same as another expression?
|
FunctionItem |
evaluateItem(XPathContext context)
Evaluate as an Item.
|
void |
explain(ExpressionPresenter destination)
Diagnostic print of expression structure.
|
ExpressionCompiler |
getExpressionCompiler()
Return the compiler of the FunctionSequenceCoercer expression
|
String |
getExpressionName()
Get a name identifying the kind of expression, in terms meaningful to a user.
|
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the items returned by the expression, if possible
|
RoleLocator |
getRole() |
TypeCheckerEnvironment |
getVisitor() |
int |
hashCode()
get HashCode for comparing two expressions.
|
SequenceIterator |
iterate(XPathContext context)
Iterate over the sequence of values
|
Expression |
simplify(ExpressionVisitor visitor)
Simplify an expression
|
Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Type-check the expression
|
displayOperator, getBaseExpression, iterateSubExpressions, optimize, promote, replaceSubExpression, toStringaddToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getImplementationMethod, getIntegerBounds, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getStreamability, getStreamingAdjunct, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterateEvents, iterateSubExpressionInfo, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, typeErrorpublic FunctionSequenceCoercer(Expression sequence, SpecificFunctionType requiredItemType, RoleLocator role, TypeCheckerEnvironment visitor)
sequence - this must be a sequence of function item values. This is not checked; a ClassCastException
will occur if the precondition is not satisfied.requiredItemType - the function item type to which all items in the sequence should be converted,
using the rules for function coercion.public Expression simplify(ExpressionVisitor visitor) throws XPathException
simplify in class UnaryExpressionvisitor - an expression visitorXPathException - if an error is discovered during expression
rewritingpublic Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
typeCheck in class UnaryExpressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public int computeSpecialProperties()
computeSpecialProperties in class UnaryExpressionStaticProperty.NON_CREATIVE.public Expression copy()
copy in class Expressionpublic SequenceIterator iterate(XPathContext context) throws XPathException
iterate in class Expressioncontext - supplies the context for evaluationXPathException - if any dynamic error occurs evaluating the
expressionpublic FunctionItem evaluateItem(XPathContext context) throws XPathException
evaluateItem in class Expressioncontext - The context in which the expression is to be evaluatedXPathException - if any dynamic error occurs evaluating the
expressionpublic ExpressionCompiler getExpressionCompiler()
getExpressionCompiler in class Expressionpublic ItemType getItemType(TypeHierarchy th)
getItemType in class UnaryExpressionth - the type hierarchy cachepublic int computeCardinality()
computeCardinality in class UnaryExpressionStaticProperty.ALLOWS_ZERO_OR_ONE,
StaticProperty.EXACTLY_ONE, StaticProperty.ALLOWS_ONE_OR_MORE,
StaticProperty.ALLOWS_ZERO_OR_MOREpublic RoleLocator getRole()
public TypeCheckerEnvironment getVisitor()
public boolean equals(Object other)
equals in class UnaryExpressionpublic int hashCode()
UnaryExpressionhashCode in class UnaryExpressionpublic String getExpressionName()
ExpressiongetExpressionName in class Expressionpublic void explain(ExpressionPresenter destination)
explain in class UnaryExpressiondestination - the expression presenter used to display the structureCopyright (c) 2004-2013 Saxonica Limited. All rights reserved.